White cookie and session type understanding

They finally generally understand the difference:

1, session exist on the server, cookie exists in a text file on the client;

2, session cookie than safety, so you can put some important login information on the session, other information is placed on the cookie myself;

3, cookie storage limit the amount of data, only 4KB, and the session is unlimited;

4, increase access, session may consume server performance, reduced server if you want to consider this cookie;

5, set the cookie time can make the cookie expire. But using session-destory (), to destroy the session.

 

So much of it, anyway, I understand, as to the future use of words, and then learn in detail -